 /*******************************************************************************
  * Copyright (c) 2003, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.dependencies;

 import java.util.*;

 /**
  * Simple selection policy.
  */

 public class SimpleSelectionPolicy implements ISelectionPolicy {
     public Set selectMultiple(ElementSet elementSet) {
         // all satisfied are selected
 return new HashSet(elementSet.getSatisfied());
     }

     public Element selectSingle(ElementSet elementSet) {
         // just pick the satisfied element with the highest version
 Element highest = null;
         for (Iterator satisfiedIter = elementSet.getSatisfied().iterator(); satisfiedIter.hasNext();) {
             Element satisfiedVersion = (Element) satisfiedIter.next();
             if (highest == null || elementSet.getSystem().compare(satisfiedVersion.getVersionId(), highest.getVersionId()) > 0)
                 highest = satisfiedVersion;
         }
         return highest;
     }
 }
